Green AgNPs Decorated ZnO Nanocomposites for Dye Degradation And Antimicrobial Applications

Abstract

Nanotechnology is an ablaze branch for the scientists which deals with study of synthesis, characterization and application of nanomaterial. Phytochemicals available as bio-molecules present in Gongura leaves can be used to reduce silver ions into silver nanoparticles in a single step by novel synthetic routes. This biogenic reduction of silver ion to silver metal is quite rapid and can be easily scaled up. ZnO nanoparticles are synthesized using popular hydrothermal route of synthesis. X-ray diffraction pattern of reaction product confirmed the formation of silver and zinc oxide nanoparticles. Optical properties, size and morphology of the ZnO-AgNPs composite has been analyzed using advanced characterization techniques. SEM analysis revels that the bare AgNPs are spherical in shape with particle size ranging from 1.1 to 1.5 µm where as ZnO are in nanorods shape with particle size ranging from 0.3 to 0.4 µm. The synthesized ZnO-Ag composite shows potential biological efficacy against pathogenic microorganisms and are effective in dye degradation. Both of the antimicrobial and antioxidant activity helps in study application of nanoparticles in medical and veterinary sciences. The 5 % AgNPs contain ZnO nanocomposites indicates photo degradation of MB dye(5.0 g/dm 3) with efficiency up to 99.21% within 75 min under UV light irradiation. This study concludes the excellent dye degradation efficiency.

A Review on Bio-inspired Synthesis of Silver Nanoparticles: Their Antimicrobial Efficacy and Toxicity

“…The synthetic route using plant extract can be summarized as per our previously published work: [64] The schematic representation of the synthesis of Green-Ag nanoparticles is shown in Fig. 6.…”

Identification of the Physicochemical Factors Involved in the Dye Separation via Methionine‐Functionalized Mesoporous Carbons

“…Currently, a few methods are used: adsorption, coagulation/flocculation, catalytic oxidation, membrane separation, photodegradation, etc. [17][18][19][20][21][22] Among those methods, membrane separation is highly attractive as it offers straightforward operation and low energy consumption. [23] Its commercial application is, however, limited due to the fouling of pollutant particles on the membrane surface and inside membrane pores.…”

Conductive Polyaniline Enhanced Decolorization of Azo Dyes in Anaerobic Wastewater Treatment

“…Azo dye molecules usually contain one or more azo bonds, thus the chemical oxidation and biological methods are often used to break the azo bonds to achieve the decolorization and degradation of azo wastewater. [8][9] Compared with the chemical oxidation methods, the biological treatment methods have widely used for treating this wastewater due to its low cost and environmental friendliness, [10][11] especially the anaerobic biological method. Under anaerobic condition, the organic substrates in the wastewater are often degraded by the bacteria through the hydrolysis and acidification processes, generating the volatile fatty acids and the reductive bioelectrons in the anaerobic system.…”